Scientists know that the world's oceans are not of uniform height, and it is possible, thinks Dr Proshutinsky, that the results might fit the so-called Arctic Oscillation, "a seesaw pattern of change in atmospheric pressure over the polar region and mid latitudes." The problem with fitting all this in is compounded by the regular cyclic changes which happen to the earth's climate, and indeed to the sun's output. What is by no means clear is whether any of these new Artcic findings can be laid at the door of human activity.Do read the whole report, which underlines how little even scientists understand what drives the climate. Something I found odd is that the same page also has a graphic on Arctic sea ice extent, which is entitled: "Arctic Ice in Retreat." The data in the graphic plots as follows:
I do think the title is somewhat gratuitously misrepresenting the data... not to mention that the time frame is vanishingly small. Anyway, here (scroll down) is some more information about what is happening to glaciers in general.